package com.fzl.lotterysystem.common.utils;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.boot.json.JsonParseException;

import java.util.List;
import java.util.concurrent.Callable;

public class JacksonUtil {
    private JacksonUtil(){

    }

    //单例操作
    private final static ObjectMapper OBJECT_MAPPER ;

    static {
        OBJECT_MAPPER = new ObjectMapper();
    }

    private static ObjectMapper getObjectMapper(){
        return OBJECT_MAPPER;
    }

    private static  <T> T tryParse(Callable<T> parser) {
       return tryParse(parser,JsonParseException.class);
    }

    private static  <T> T tryParse(Callable<T> parser, Class<? extends Exception> check) {
        try {
            return parser.call();
        } catch (Exception var4) {
            if (check.isAssignableFrom(var4.getClass())) {
                throw new JsonParseException(var4);
            }

            throw new IllegalStateException(var4);
        }
    }

    //序列化
    public static String writeValueAsString(Object object)  {
        return JacksonUtil.tryParse(()->{
            return JacksonUtil.getObjectMapper().writeValueAsString(object);
        });
    }

//    反序列化
    public static <T> T readValue(String content, Class<T> valueType) {
        return JacksonUtil.tryParse(()->{
            return JacksonUtil.getObjectMapper().readValue(content, valueType);
        });
    }

//List反序列
    public static <T> T readListValue(String content, Class<?> paramClasses) {
        JavaType javaType = JacksonUtil.getObjectMapper().getTypeFactory()
                .constructParametricType(List.class, paramClasses);
        return JacksonUtil.tryParse(() -> {
            return JacksonUtil.getObjectMapper().readValue(content, javaType);
        });
    }
}
